Rockbox mail archive
Subject: Re: USB 2.0 chip in R20 / USB on-the-go / image viewer / mic preamp
From: Sebastian J. Osterfeld (sjo_at_stanford.edu)
Sorry, I changed my name to the real thing... Accidentally put the news
server in the name field, too.
----- Original Message -----
From: "news.gmane.org" <SJOsterfeld_at_gmx.de>
Sent: Tuesday, December 03, 2002 4:01 PM
Subject: USB 2.0 chip in R20 / USB on-the-go / image viewer / mic preamp
> I know rockbox has the documentation on the USB ISD-300 controller in the
> Archos recorder, but I think the Recorder 20 with its USB 2.0 interface
> might have another controller.
> Does anyone know which controller is in the Recorder 20GB? I haven't
> my recorder 20 yet... should arrive in 10 days or so, for ~US $200 after
> rebate... :)
> The idea is, since the Recoder 20 has advanced USB, maybe if we had the
> documentation we could see if the chip might possibly support USB
> or if there will be a pin-compatible chip that does. USB on-the-go would
> great - imagine, hook up your digicam (say, while camping) via USB, and
> Recorder downloads all your data onto the HD. Then you're ready for
> day of shooting 200+ pics. In general, I'd like to add versatile USB
> data-leeching capabilities to the Archos :)
> I know that the Multimedia Jukebox sort of offers this feature, but I
> like it all that much: No replaceable AA batteries, only USB 1.0
> and all the good features (USB 2.0, firewire, smartmedia reader) require
> bulky and expensive add-on modules... :(
> So, I'd rather have the Recorder 20 with integrated USB 2.0, and somhow
> implement USB on-the-go. Then I'd also try to implement a 4-grayscale
> viewer, just to check if the jpgs arrived o.k. - I mean, I think the small
> color display on the Multimedia Jukebox is nice, but not really good
> for anything serious, so having a grayscale display is almost as good.
> I just wish I could program better...
> Oh, here's one thing I can do, though: I will try to build my own Archos
> mic-preamp... does anyone, by chance, have a picture of what the original
> $50 pre-amp from Archos looks like on the inside? I found some schematics
> for a preamp here:
> http://www.geocities.com/ferocious_1999/md/micpreamp2.html which I intend
> slighly modify by using the newer and advanced low-power hifi op-amp
> from TI. Maybe this 5V op-amp will make a good replacement/upgrade for
> whatever they have in the Archos preamp... so, once again, does anyone
> an idea what the internals of the Archos preamp look like? Battery?
> board? Probably all integrated w/o solder... Etc. ?
Page was last modified "Jan 10 2012" The Rockbox Crew